1 /**************************************************************************
3 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
29 #include "main/glheader.h"
30 #include "main/context.h"
31 #include "main/state.h"
32 #include "main/enums.h"
34 #include "vbo/vbo_context.h"
35 #include "swrast/swrast.h"
36 #include "swrast_setup/swrast_setup.h"
39 #include "brw_defines.h"
40 #include "brw_context.h"
41 #include "brw_state.h"
43 #include "intel_batchbuffer.h"
45 #define FILE_DEBUG_FLAG DEBUG_BATCH
47 static GLuint prim_to_hw_prim
[GL_POLYGON
+1] = {
61 static const GLenum reduced_prim
[GL_POLYGON
+1] = {
75 /* When the primitive changes, set a state bit and re-validate. Not
76 * the nicest and would rather deal with this by having all the
77 * programs be immune to the active primitive (ie. cope with all
78 * possibilities). That may not be realistic however.
80 static GLuint
brw_set_prim(struct brw_context
*brw
,
81 const struct _mesa_prim
*prim
)
83 GLcontext
*ctx
= &brw
->intel
.ctx
;
84 GLenum mode
= prim
->mode
;
86 if (INTEL_DEBUG
& DEBUG_PRIMS
)
87 printf("PRIM: %s\n", _mesa_lookup_enum_by_nr(prim
->mode
));
89 /* Slight optimization to avoid the GS program when not needed:
91 if (mode
== GL_QUAD_STRIP
&&
92 ctx
->Light
.ShadeModel
!= GL_FLAT
&&
93 ctx
->Polygon
.FrontMode
== GL_FILL
&&
94 ctx
->Polygon
.BackMode
== GL_FILL
)
95 mode
= GL_TRIANGLE_STRIP
;
97 if (prim
->mode
== GL_QUADS
&& prim
->count
== 4 &&
98 ctx
->Light
.ShadeModel
!= GL_FLAT
&&
99 ctx
->Polygon
.FrontMode
== GL_FILL
&&
100 ctx
->Polygon
.BackMode
== GL_FILL
) {
101 mode
= GL_TRIANGLE_FAN
;
104 if (mode
!= brw
->primitive
) {
105 brw
->primitive
= mode
;
106 brw
->state
.dirty
.brw
|= BRW_NEW_PRIMITIVE
;
108 if (reduced_prim
[mode
] != brw
->intel
.reduced_primitive
) {
109 brw
->intel
.reduced_primitive
= reduced_prim
[mode
];
110 brw
->state
.dirty
.brw
|= BRW_NEW_REDUCED_PRIMITIVE
;
114 return prim_to_hw_prim
[mode
];
118 static GLuint
trim(GLenum prim
, GLuint length
)
120 if (prim
== GL_QUAD_STRIP
)
121 return length
> 3 ? (length
- length
% 2) : 0;
122 else if (prim
== GL_QUADS
)
123 return length
- length
% 4;
129 static void brw_emit_prim(struct brw_context
*brw
,
130 const struct _mesa_prim
*prim
,
133 struct brw_3d_primitive prim_packet
;
134 struct intel_context
*intel
= &brw
->intel
;
136 if (INTEL_DEBUG
& DEBUG_PRIMS
)
137 printf("PRIM: %s %d %d\n", _mesa_lookup_enum_by_nr(prim
->mode
),
138 prim
->start
, prim
->count
);
140 prim_packet
.header
.opcode
= CMD_3D_PRIM
;
141 prim_packet
.header
.length
= sizeof(prim_packet
)/4 - 2;
142 prim_packet
.header
.pad
= 0;
143 prim_packet
.header
.topology
= hw_prim
;
144 prim_packet
.header
.indexed
= prim
->indexed
;
146 prim_packet
.verts_per_instance
= trim(prim
->mode
, prim
->count
);
147 prim_packet
.start_vert_location
= prim
->start
;
149 prim_packet
.start_vert_location
+= brw
->ib
.start_vertex_offset
;
150 prim_packet
.instance_count
= 1;
151 prim_packet
.start_instance_location
= 0;
152 prim_packet
.base_vert_location
= prim
->basevertex
;
154 /* If we're set to always flush, do it before and after the primitive emit.
155 * We want to catch both missed flushes that hurt instruction/state cache
156 * and missed flushes of the render cache as it heads to other parts of
157 * the besides the draw code.
159 if (intel
->always_flush_cache
) {
160 intel_batchbuffer_emit_mi_flush(intel
->batch
);
162 if (prim_packet
.verts_per_instance
) {
163 intel_batchbuffer_data( brw
->intel
.batch
, &prim_packet
,
164 sizeof(prim_packet
));
166 if (intel
->always_flush_cache
) {
167 intel_batchbuffer_emit_mi_flush(intel
->batch
);
171 static void brw_merge_inputs( struct brw_context
*brw
,
172 const struct gl_client_array
*arrays
[])
174 struct brw_vertex_info old
= brw
->vb
.info
;
177 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++)
178 drm_intel_bo_unreference(brw
->vb
.inputs
[i
].bo
);
180 memset(&brw
->vb
.inputs
, 0, sizeof(brw
->vb
.inputs
));
181 memset(&brw
->vb
.info
, 0, sizeof(brw
->vb
.info
));
183 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
184 brw
->vb
.inputs
[i
].glarray
= arrays
[i
];
185 brw
->vb
.inputs
[i
].attrib
= (gl_vert_attrib
) i
;
187 if (arrays
[i
]->StrideB
!= 0)
188 brw
->vb
.info
.sizes
[i
/16] |= (brw
->vb
.inputs
[i
].glarray
->Size
- 1) <<
192 /* Raise statechanges if input sizes have changed. */
193 if (memcmp(brw
->vb
.info
.sizes
, old
.sizes
, sizeof(old
.sizes
)) != 0)
194 brw
->state
.dirty
.brw
|= BRW_NEW_INPUT_DIMENSIONS
;
197 /* XXX: could split the primitive list to fallback only on the
198 * non-conformant primitives.
200 static GLboolean
check_fallbacks( struct brw_context
*brw
,
201 const struct _mesa_prim
*prim
,
204 GLcontext
*ctx
= &brw
->intel
.ctx
;
208 if (brw
->intel
.gen
>= 6) {
209 for (i
= 0; i
< nr_prims
; i
++)
210 if (prim
[i
].mode
== GL_LINE_LOOP
)
214 /* If we don't require strict OpenGL conformance, never
215 * use fallbacks. If we're forcing fallbacks, always
218 if (brw
->intel
.conformance_mode
== 0)
221 if (brw
->intel
.conformance_mode
== 2)
224 if (ctx
->Polygon
.SmoothFlag
) {
225 for (i
= 0; i
< nr_prims
; i
++)
226 if (reduced_prim
[prim
[i
].mode
] == GL_TRIANGLES
)
230 /* BRW hardware will do AA lines, but they are non-conformant it
231 * seems. TBD whether we keep this fallback:
233 if (ctx
->Line
.SmoothFlag
) {
234 for (i
= 0; i
< nr_prims
; i
++)
235 if (reduced_prim
[prim
[i
].mode
] == GL_LINES
)
239 /* Stipple -- these fallbacks could be resolved with a little
242 if (ctx
->Line
.StippleFlag
) {
243 for (i
= 0; i
< nr_prims
; i
++) {
244 /* GS doesn't get enough information to know when to reset
245 * the stipple counter?!?
247 if (prim
[i
].mode
== GL_LINE_LOOP
|| prim
[i
].mode
== GL_LINE_STRIP
)
250 if (prim
[i
].mode
== GL_POLYGON
&&
251 (ctx
->Polygon
.FrontMode
== GL_LINE
||
252 ctx
->Polygon
.BackMode
== GL_LINE
))
257 if (ctx
->Point
.SmoothFlag
) {
258 for (i
= 0; i
< nr_prims
; i
++)
259 if (prim
[i
].mode
== GL_POINTS
)
263 /* BRW hardware doesn't handle GL_CLAMP texturing correctly;
264 * brw_wm_sampler_state:translate_wrap_mode() treats GL_CLAMP
265 * as GL_CLAMP_TO_EDGE instead. If we're using GL_CLAMP, and
266 * we want strict conformance, force the fallback.
267 * Right now, we only do this for 2D textures.
271 for (u
= 0; u
< ctx
->Const
.MaxTextureCoordUnits
; u
++) {
272 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[u
];
273 if (texUnit
->Enabled
) {
274 if (texUnit
->Enabled
& TEXTURE_1D_BIT
) {
275 if (texUnit
->CurrentTex
[TEXTURE_1D_INDEX
]->WrapS
== GL_CLAMP
) {
279 if (texUnit
->Enabled
& TEXTURE_2D_BIT
) {
280 if (texUnit
->CurrentTex
[TEXTURE_2D_INDEX
]->WrapS
== GL_CLAMP
||
281 texUnit
->CurrentTex
[TEXTURE_2D_INDEX
]->WrapT
== GL_CLAMP
) {
285 if (texUnit
->Enabled
& TEXTURE_3D_BIT
) {
286 if (texUnit
->CurrentTex
[TEXTURE_3D_INDEX
]->WrapS
== GL_CLAMP
||
287 texUnit
->CurrentTex
[TEXTURE_3D_INDEX
]->WrapT
== GL_CLAMP
||
288 texUnit
->CurrentTex
[TEXTURE_3D_INDEX
]->WrapR
== GL_CLAMP
) {
296 /* Nothing stopping us from the fast path now */
300 /* May fail if out of video memory for texture or vbo upload, or on
301 * fallback conditions.
303 static GLboolean
brw_try_draw_prims( GLcontext
*ctx
,
304 const struct gl_client_array
*arrays
[],
305 const struct _mesa_prim
*prim
,
307 const struct _mesa_index_buffer
*ib
,
311 struct intel_context
*intel
= intel_context(ctx
);
312 struct brw_context
*brw
= brw_context(ctx
);
313 GLboolean retval
= GL_FALSE
;
314 GLboolean warn
= GL_FALSE
;
315 GLboolean first_time
= GL_TRUE
;
319 _mesa_update_state( ctx
);
321 /* We have to validate the textures *before* checking for fallbacks;
322 * otherwise, the software fallback won't be able to rely on the
323 * texture state, the firstLevel and lastLevel fields won't be
324 * set in the intel texture object (they'll both be 0), and the
325 * software fallback will segfault if it attempts to access any
326 * texture level other than level 0.
328 brw_validate_textures( brw
);
330 if (check_fallbacks(brw
, prim
, nr_prims
))
333 /* Bind all inputs, derive varying and size information:
335 brw_merge_inputs( brw
, arrays
);
338 brw
->state
.dirty
.brw
|= BRW_NEW_INDICES
;
340 brw
->vb
.min_index
= min_index
;
341 brw
->vb
.max_index
= max_index
;
342 brw
->state
.dirty
.brw
|= BRW_NEW_VERTICES
;
344 /* Have to validate state quite late. Will rebuild tnl_program,
345 * which depends on varying information.
347 * Note this is where brw->vs->prog_data.inputs_read is calculated,
348 * so can't access it earlier.
351 intel_prepare_render(intel
);
353 for (i
= 0; i
< nr_prims
; i
++) {
356 /* Flush the batch if it's approaching full, so that we don't wrap while
357 * we've got validated state that needs to be in the same batch as the
358 * primitives. This fraction is just a guess (minimal full state plus
359 * a primitive is around 512 bytes), and would be better if we had
360 * an upper bound of how much we might emit in a single
361 * brw_try_draw_prims().
363 intel_batchbuffer_require_space(intel
->batch
, intel
->batch
->size
/ 4);
365 hw_prim
= brw_set_prim(brw
, &prim
[i
]);
367 if (first_time
|| (brw
->state
.dirty
.brw
& BRW_NEW_PRIMITIVE
)) {
368 first_time
= GL_FALSE
;
370 brw_validate_state(brw
);
372 /* Various fallback checks: */
373 if (brw
->intel
.Fallback
)
376 /* Check that we can fit our state in with our existing batchbuffer, or
379 if (dri_bufmgr_check_aperture_space(brw
->state
.validated_bos
,
380 brw
->state
.validated_bo_count
)) {
381 static GLboolean warned
;
382 intel_batchbuffer_flush(intel
->batch
);
384 /* Validate the state after we flushed the batch (which would have
385 * changed the set of dirty state). If we still fail to
386 * check_aperture, warn of what's happening, but attempt to continue
387 * on since it may succeed anyway, and the user would probably rather
388 * see a failure and a warning than a fallback.
390 brw_validate_state(brw
);
392 dri_bufmgr_check_aperture_space(brw
->state
.validated_bos
,
393 brw
->state
.validated_bo_count
)) {
399 intel
->no_batch_wrap
= GL_TRUE
;
400 brw_upload_state(brw
);
403 brw_emit_prim(brw
, &prim
[i
], hw_prim
);
405 intel
->no_batch_wrap
= GL_FALSE
;
410 if (intel
->always_flush_batch
)
411 intel_batchbuffer_flush(intel
->batch
);
414 brw_state_cache_check_size(brw
);
417 fprintf(stderr
, "i965: Single primitive emit potentially exceeded "
418 "available aperture space\n");
421 DBG("%s failed\n", __FUNCTION__
);
426 void brw_draw_prims( GLcontext
*ctx
,
427 const struct gl_client_array
*arrays
[],
428 const struct _mesa_prim
*prim
,
430 const struct _mesa_index_buffer
*ib
,
431 GLboolean index_bounds_valid
,
437 if (!vbo_all_varyings_in_vbos(arrays
)) {
438 if (!index_bounds_valid
)
439 vbo_get_minmax_index(ctx
, prim
, ib
, &min_index
, &max_index
);
441 /* Decide if we want to rebase. If so we end up recursing once
442 * only into this function.
444 if (min_index
!= 0) {
445 vbo_rebase_prims(ctx
, arrays
,
447 ib
, min_index
, max_index
,
453 /* Make a first attempt at drawing:
455 retval
= brw_try_draw_prims(ctx
, arrays
, prim
, nr_prims
, ib
, min_index
, max_index
);
457 /* Otherwise, we really are out of memory. Pass the drawing
458 * command to the software tnl module and which will in turn call
459 * swrast to do the drawing.
462 _swsetup_Wakeup(ctx
);
463 _tnl_draw_prims(ctx
, arrays
, prim
, nr_prims
, ib
, min_index
, max_index
);
468 void brw_draw_init( struct brw_context
*brw
)
470 GLcontext
*ctx
= &brw
->intel
.ctx
;
471 struct vbo_context
*vbo
= vbo_context(ctx
);
473 /* Register our drawing function:
475 vbo
->draw_prims
= brw_draw_prims
;
478 void brw_draw_destroy( struct brw_context
*brw
)
482 if (brw
->vb
.upload
.bo
!= NULL
) {
483 drm_intel_bo_unreference(brw
->vb
.upload
.bo
);
484 brw
->vb
.upload
.bo
= NULL
;
487 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
488 drm_intel_bo_unreference(brw
->vb
.inputs
[i
].bo
);
489 brw
->vb
.inputs
[i
].bo
= NULL
;
492 drm_intel_bo_unreference(brw
->ib
.bo
);